<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>persegi</title>
</head>

<body>
menghitung persegi
<form>
 sisi : <input type="text" align="middle" name="sisi" /><br />
 <input type="submit" value="proses" /><br />
 </form>
 
 <?php
 $sisi=$_GET[sisi];
 $luas=($sisi*$sisi);
 $keliling=(4*$sisi);
 
 printf("hasil = $sisi<br>");
 printf("luas = $luas<br>");
 printf("keliling = $keliling");
 ?>
 
 
</body>
</html>
